1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2 /* bus.c message bus context object
4 * Copyright (C) 2003, 2004 Red Hat, Inc.
5 * Copyright (C) 2013 Samsung Electronics
7 * Licensed under the Academic Free License version 2.1
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
30 #include "activation.h"
31 #include "connection.h"
35 #include "config-parser.h"
38 #include "dir-watch.h"
39 #include <dbus/dbus-list.h>
40 #include <dbus/dbus-hash.h>
41 #include <dbus/dbus-credentials.h>
42 #include <dbus/dbus-internals.h>
63 BusConnections *connections;
64 BusActivation *activation;
65 BusRegistry *registry;
67 BusMatchmaker *matchmaker;
69 unsigned int fork : 1;
70 unsigned int syslog : 1;
71 unsigned int keep_umask : 1;
72 unsigned int allow_anonymous : 1;
73 unsigned int systemd_activation : 1;
74 DBusConnection *myKdbusConnection; //todo maybe can be rafctored and removed
77 static dbus_int32_t server_data_slot = -1;
84 #define BUS_SERVER_DATA(server) (dbus_server_get_data ((server), server_data_slot))
87 server_get_context (DBusServer *server)
92 if (!dbus_server_allocate_data_slot (&server_data_slot))
95 bd = BUS_SERVER_DATA (server);
98 dbus_server_free_data_slot (&server_data_slot);
102 context = bd->context;
104 dbus_server_free_data_slot (&server_data_slot);
110 add_server_watch (DBusWatch *watch,
113 DBusServer *server = data;
116 context = server_get_context (server);
118 return _dbus_loop_add_watch (context->loop, watch);
122 remove_server_watch (DBusWatch *watch,
125 DBusServer *server = data;
128 context = server_get_context (server);
130 _dbus_loop_remove_watch (context->loop, watch);
134 toggle_server_watch (DBusWatch *watch,
137 DBusServer *server = data;
140 context = server_get_context (server);
142 _dbus_loop_toggle_watch (context->loop, watch);
146 add_server_timeout (DBusTimeout *timeout,
149 DBusServer *server = data;
152 context = server_get_context (server);
154 return _dbus_loop_add_timeout (context->loop, timeout);
158 remove_server_timeout (DBusTimeout *timeout,
161 DBusServer *server = data;
164 context = server_get_context (server);
166 _dbus_loop_remove_timeout (context->loop, timeout);
170 new_connection_callback (DBusServer *server,
171 DBusConnection *new_connection,
174 BusContext *context = data;
176 if (!bus_connections_setup_connection (context->connections, new_connection))
178 _dbus_verbose ("No memory to setup new connection\n");
180 /* if we don't do this, it will get unref'd without
181 * being disconnected... kind of strange really
182 * that we have to do this, people won't get it right
185 dbus_connection_close (new_connection);
188 dbus_connection_set_max_received_size (new_connection,
189 context->limits.max_incoming_bytes);
191 dbus_connection_set_max_message_size (new_connection,
192 context->limits.max_message_size);
194 dbus_connection_set_max_received_unix_fds (new_connection,
195 context->limits.max_incoming_unix_fds);
197 dbus_connection_set_max_message_unix_fds (new_connection,
198 context->limits.max_message_unix_fds);
200 dbus_connection_set_allow_anonymous (new_connection,
201 context->allow_anonymous);
203 /* on OOM, we won't have ref'd the connection so it will die. */
207 free_server_data (void *data)
209 BusServerData *bd = data;
215 setup_server (BusContext *context,
217 char **auth_mechanisms,
222 bd = dbus_new0 (BusServerData, 1);
223 if (bd == NULL || !dbus_server_set_data (server,
225 bd, free_server_data))
232 bd->context = context;
234 if (!dbus_server_set_auth_mechanisms (server, (const char**) auth_mechanisms))
240 dbus_server_set_new_connection_function (server,
241 new_connection_callback,
244 if (!dbus_server_set_watch_functions (server,
255 if (!dbus_server_set_timeout_functions (server,
257 remove_server_timeout,
268 /* This code only gets executed the first time the
269 * config files are parsed. It is not executed
270 * when config files are reloaded.
273 process_config_first_time_only (BusContext *context,
274 BusConfigParser *parser,
275 const DBusString *address,
276 BusContextFlags flags,
279 DBusString log_prefix;
281 DBusList **addresses;
282 const char *user, *pidfile;
283 char **auth_mechanisms;
284 DBusList **auth_mechanisms_list;
288 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
291 auth_mechanisms = NULL;
294 _dbus_init_system_log (TRUE);
296 if (flags & BUS_CONTEXT_FLAG_SYSTEMD_ACTIVATION)
297 context->systemd_activation = TRUE;
299 context->systemd_activation = FALSE;
301 /* Check for an existing pid file. Of course this is a race;
302 * we'd have to use fcntl() locks on the pid file to
303 * avoid that. But we want to check for the pid file
304 * before overwriting any existing sockets, etc.
307 if (flags & BUS_CONTEXT_FLAG_WRITE_PID_FILE)
308 pidfile = bus_config_parser_get_pidfile (parser);
315 _dbus_string_init_const (&u, pidfile);
317 if (_dbus_stat (&u, &stbuf, NULL))
323 _dbus_string_init (&p);
324 _dbus_file_get_contents(&p, &u, NULL);
325 _dbus_string_parse_int(&p, 0, &pid, NULL);
326 _dbus_string_free(&p);
328 if ((kill((int)pid, 0))) {
329 dbus_set_error(NULL, DBUS_ERROR_FILE_EXISTS,
330 "pid %ld not running, removing stale pid file\n",
332 _dbus_delete_file(&u, NULL);
335 dbus_set_error (error, DBUS_ERROR_FAILED,
336 "The pid file \"%s\" exists, if the message bus is not running, remove this file",
345 /* keep around the pid filename so we can delete it later */
346 context->pidfile = _dbus_strdup (pidfile);
348 /* note that type may be NULL */
349 context->type = _dbus_strdup (bus_config_parser_get_type (parser));
350 if (bus_config_parser_get_type (parser) != NULL && context->type == NULL)
353 user = bus_config_parser_get_user (parser);
356 context->user = _dbus_strdup (user);
357 if (context->user == NULL)
361 /* Set up the prefix for syslog messages */
362 if (!_dbus_string_init (&log_prefix))
364 if (context->type && !strcmp (context->type, "system"))
366 if (!_dbus_string_append (&log_prefix, "[system] "))
369 else if (context->type && !strcmp (context->type, "session"))
371 DBusCredentials *credentials;
373 credentials = _dbus_credentials_new_from_current_process ();
376 if (!_dbus_string_append (&log_prefix, "[session "))
378 _dbus_credentials_unref (credentials);
381 if (!_dbus_credentials_to_string_append (credentials, &log_prefix))
383 _dbus_credentials_unref (credentials);
386 if (!_dbus_string_append (&log_prefix, "] "))
388 _dbus_credentials_unref (credentials);
391 _dbus_credentials_unref (credentials);
393 if (!_dbus_string_steal_data (&log_prefix, &context->log_prefix))
395 _dbus_string_free (&log_prefix);
397 /* Build an array of auth mechanisms */
399 auth_mechanisms_list = bus_config_parser_get_mechanisms (parser);
400 len = _dbus_list_get_length (auth_mechanisms_list);
406 auth_mechanisms = dbus_new0 (char*, len + 1);
407 if (auth_mechanisms == NULL)
411 link = _dbus_list_get_first_link (auth_mechanisms_list);
414 auth_mechanisms[i] = _dbus_strdup (link->data);
415 if (auth_mechanisms[i] == NULL)
417 link = _dbus_list_get_next_link (auth_mechanisms_list, link);
423 auth_mechanisms = NULL;
426 /* Listen on our addresses */
430 if(!strcmp(_dbus_string_get_const_data(address), "kdbus:"))
436 if(!strcmp (context->type, "system"))
437 type = DBUS_BUS_SYSTEM;
438 else if(!strcmp (context->type, "session"))
439 type = DBUS_BUS_SESSION;
441 type = DBUS_BUS_STARTER;
443 bus_address = make_kdbus_bus(type, error);
444 if(bus_address == NULL)
447 server = empty_server_init(bus_address);
454 if (!_dbus_list_append (&context->servers, server))
460 context->myKdbusConnection = daemon_as_client(type, bus_address, error);
461 if(context->myKdbusConnection == NULL)
468 server = dbus_server_listen (_dbus_string_get_const_data(address), error);
471 _DBUS_ASSERT_ERROR_IS_SET (error);
474 else if (!setup_server (context, server, auth_mechanisms, error))
476 _DBUS_ASSERT_ERROR_IS_SET (error);
480 if (!_dbus_list_append (&context->servers, server))
486 addresses = bus_config_parser_get_addresses (parser);
488 link = _dbus_list_get_first_link (addresses);
493 server = dbus_server_listen (link->data, error);
496 _DBUS_ASSERT_ERROR_IS_SET (error);
499 else if (!setup_server (context, server, auth_mechanisms, error))
501 _DBUS_ASSERT_ERROR_IS_SET (error);
505 if (!_dbus_list_append (&context->servers, server))
508 link = _dbus_list_get_next_link (addresses, link);
512 context->fork = bus_config_parser_get_fork (parser);
513 context->syslog = bus_config_parser_get_syslog (parser);
514 context->keep_umask = bus_config_parser_get_keep_umask (parser);
515 context->allow_anonymous = bus_config_parser_get_allow_anonymous (parser);
517 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
521 dbus_free_string_array (auth_mechanisms);
526 dbus_free_string_array (auth_mechanisms);
530 /* This code gets executed every time the config files
531 * are parsed: both during BusContext construction
532 * and on reloads. This function is slightly screwy
533 * since it can do a "half reload" in out-of-memory
534 * situations. Realistically, unlikely to ever matter.
537 process_config_every_time (BusContext *context,
538 BusConfigParser *parser,
539 dbus_bool_t is_reload,
542 DBusString full_address;
546 const char *servicehelper;
551 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
556 if (!_dbus_string_init (&full_address))
562 /* get our limits and timeout lengths */
563 bus_config_parser_get_limits (parser, &context->limits);
566 bus_policy_unref (context->policy);
567 context->policy = bus_config_parser_steal_policy (parser);
568 _dbus_assert (context->policy != NULL);
570 /* We have to build the address backward, so that
571 * <listen> later in the config file have priority
573 link = _dbus_list_get_last_link (&context->servers);
576 addr = dbus_server_get_address (link->data);
583 if (_dbus_string_get_length (&full_address) > 0)
585 if (!_dbus_string_append (&full_address, ";"))
592 if (!_dbus_string_append (&full_address, addr))
601 link = _dbus_list_get_prev_link (&context->servers, link);
605 dbus_free (context->address);
607 if (!_dbus_string_copy_data (&full_address, &context->address))
613 /* get the service directories */
614 dirs = bus_config_parser_get_service_dirs (parser);
616 /* and the service helper */
617 servicehelper = bus_config_parser_get_servicehelper (parser);
619 s = _dbus_strdup(servicehelper);
620 if (s == NULL && servicehelper != NULL)
627 dbus_free(context->servicehelper);
628 context->servicehelper = s;
631 /* Create activation subsystem */
632 if (context->activation)
634 if (!bus_activation_reload (context->activation, &full_address, dirs, error))
639 context->activation = bus_activation_new (context, &full_address, dirs, error);
642 if (context->activation == NULL)
644 _DBUS_ASSERT_ERROR_IS_SET (error);
648 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
652 _dbus_string_free (&full_address);
661 list_concat_new (DBusList **a,
669 for (link = _dbus_list_get_first_link (a); link; link = _dbus_list_get_next_link (a, link))
671 if (!_dbus_list_append (result, link->data))
674 for (link = _dbus_list_get_first_link (b); link; link = _dbus_list_get_next_link (b, link))
676 if (!_dbus_list_append (result, link->data))
682 _dbus_list_clear (result);
687 raise_file_descriptor_limit (BusContext *context)
690 /* I just picked this out of thin air; we need some extra
691 * descriptors for things like any internal pipes we create,
692 * inotify, connections to SELinux, etc.
694 unsigned int arbitrary_extra_fds = 32;
697 limit = context->limits.max_completed_connections +
698 context->limits.max_incomplete_connections
699 + arbitrary_extra_fds;
701 _dbus_request_file_descriptor_limit (limit);
705 process_config_postinit (BusContext *context,
706 BusConfigParser *parser,
709 DBusHashTable *service_context_table;
710 DBusList *watched_dirs = NULL;
712 raise_file_descriptor_limit (context);
714 service_context_table = bus_config_parser_steal_service_context_table (parser);
715 if (!bus_registry_set_service_context_table (context->registry,
716 service_context_table))
722 _dbus_hash_table_unref (service_context_table);
724 /* We need to monitor both the configuration directories and directories
725 * containing .service files.
727 if (!list_concat_new (bus_config_parser_get_conf_dirs (parser),
728 bus_config_parser_get_service_dirs (parser),
735 bus_set_watched_dirs (context, &watched_dirs);
737 _dbus_list_clear (&watched_dirs);
743 bus_context_new (const DBusString *config_file,
744 BusContextFlags flags,
745 DBusPipe *print_addr_pipe,
746 DBusPipe *print_pid_pipe,
747 const DBusString *address,
751 BusConfigParser *parser;
753 _dbus_assert ((flags & BUS_CONTEXT_FLAG_FORK_NEVER) == 0 ||
754 (flags & BUS_CONTEXT_FLAG_FORK_ALWAYS) == 0);
756 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
761 if (!dbus_server_allocate_data_slot (&server_data_slot))
767 context = dbus_new0 (BusContext, 1);
773 context->refcount = 1;
774 context->myKdbusConnection = NULL;
776 _dbus_generate_uuid (&context->uuid);
778 if (!_dbus_string_copy_data (config_file, &context->config_file))
784 context->loop = _dbus_loop_new ();
785 if (context->loop == NULL)
791 context->registry = bus_registry_new (context);
792 if (context->registry == NULL)
798 parser = bus_config_load (config_file, TRUE, NULL, error);
801 _DBUS_ASSERT_ERROR_IS_SET (error);
805 if (!process_config_first_time_only (context, parser, address, flags, error))
807 _DBUS_ASSERT_ERROR_IS_SET (error);
810 if (!process_config_every_time (context, parser, FALSE, error))
812 _DBUS_ASSERT_ERROR_IS_SET (error);
816 /* we need another ref of the server data slot for the context
819 if (!dbus_server_allocate_data_slot (&server_data_slot))
820 _dbus_assert_not_reached ("second ref of server data slot failed");
822 /* Note that we don't know whether the print_addr_pipe is
823 * one of the sockets we're using to listen on, or some
824 * other random thing. But I think the answer is "don't do
827 if (print_addr_pipe != NULL && _dbus_pipe_is_valid (print_addr_pipe))
830 const char *a = bus_context_get_address (context);
833 _dbus_assert (a != NULL);
834 if (!_dbus_string_init (&addr))
840 if (!_dbus_string_append (&addr, a) ||
841 !_dbus_string_append (&addr, "\n"))
843 _dbus_string_free (&addr);
848 bytes = _dbus_string_get_length (&addr);
849 if (_dbus_pipe_write (print_addr_pipe, &addr, 0, bytes, error) != bytes)
851 /* pipe write returns an error on failure but not short write */
852 if (error != NULL && !dbus_error_is_set (error))
854 dbus_set_error (error, DBUS_ERROR_FAILED,
855 "Printing message bus address: did not write all bytes\n");
857 _dbus_string_free (&addr);
861 if (!_dbus_pipe_is_stdout_or_stderr (print_addr_pipe))
862 _dbus_pipe_close (print_addr_pipe, NULL);
864 _dbus_string_free (&addr);
867 context->connections = bus_connections_new (context);
868 if (context->connections == NULL)
874 context->matchmaker = bus_matchmaker_new ();
875 if (context->matchmaker == NULL)
881 /* check user before we fork */
882 if (context->user != NULL)
884 if (!_dbus_verify_daemon_user (context->user))
886 dbus_set_error (error, DBUS_ERROR_FAILED,
887 "Could not get UID and GID for username \"%s\"",
893 /* Now become a daemon if appropriate and write out pid file in any case */
897 if (context->pidfile)
898 _dbus_string_init_const (&u, context->pidfile);
900 if (((flags & BUS_CONTEXT_FLAG_FORK_NEVER) == 0 && context->fork) ||
901 (flags & BUS_CONTEXT_FLAG_FORK_ALWAYS))
903 _dbus_verbose ("Forking and becoming daemon\n");
905 if (!_dbus_become_daemon (context->pidfile ? &u : NULL,
908 context->keep_umask))
910 _DBUS_ASSERT_ERROR_IS_SET (error);
916 _dbus_verbose ("Fork not requested\n");
918 /* Need to write PID file and to PID pipe for ourselves,
919 * not for the child process. This is a no-op if the pidfile
920 * is NULL and print_pid_pipe is NULL.
922 if (!_dbus_write_pid_to_file_and_pipe (context->pidfile ? &u : NULL,
927 _DBUS_ASSERT_ERROR_IS_SET (error);
933 if (print_pid_pipe && _dbus_pipe_is_valid (print_pid_pipe) &&
934 !_dbus_pipe_is_stdout_or_stderr (print_pid_pipe))
935 _dbus_pipe_close (print_pid_pipe, NULL);
937 if (!bus_selinux_full_init ())
939 bus_context_log (context, DBUS_SYSTEM_LOG_FATAL, "SELinux enabled but AVC initialization failed; check system log\n");
942 if (!process_config_postinit (context, parser, error))
944 _DBUS_ASSERT_ERROR_IS_SET (error);
950 bus_config_parser_unref (parser);
954 /* Here we change our credentials if required,
955 * as soon as we've set up our sockets and pidfile
957 if (context->user != NULL)
959 if (!_dbus_change_to_daemon_user (context->user, error))
961 _DBUS_ASSERT_ERROR_IS_SET (error);
966 /* FIXME - why not just put this in full_init() below? */
967 bus_selinux_audit_init ();
971 dbus_server_free_data_slot (&server_data_slot);
973 if(context->myKdbusConnection)
975 DBusString unique_name;
977 if(!bus_connections_setup_connection(context->connections, context->myKdbusConnection))
979 _dbus_verbose ("Bus connections setup connection failed for myKdbusConnection!\n");
980 dbus_connection_close (context->myKdbusConnection);
981 dbus_connection_unref (context->myKdbusConnection);
984 dbus_connection_set_route_peer_messages (context->myKdbusConnection, FALSE);
985 _dbus_string_init_const (&unique_name, ":1.1"); //dbus_bus_get_unique_name(context->myConnection)); this is without :1.
986 if(!bus_connection_complete (context->myKdbusConnection, &unique_name, error))
988 _dbus_verbose ("Bus connection complete failed for myKdbusConnection!\n");
992 if(!register_daemon_name(context->myKdbusConnection))
994 _dbus_verbose ("Registering org.freedesktop.DBus name for daemon failed!\n");
997 if(!register_kdbus_starters(context->myKdbusConnection))
999 _dbus_verbose ("Registering kdbus starters for dbus activatable names failed!\n");
1008 bus_config_parser_unref (parser);
1009 if (context != NULL)
1010 bus_context_unref (context);
1012 if (server_data_slot >= 0)
1013 dbus_server_free_data_slot (&server_data_slot);
1019 bus_context_get_id (BusContext *context,
1022 return _dbus_uuid_encode (&context->uuid, uuid);
1026 bus_context_reload_config (BusContext *context,
1029 BusConfigParser *parser;
1030 DBusString config_file;
1033 /* Flush the user database cache */
1034 _dbus_flush_caches ();
1037 _dbus_string_init_const (&config_file, context->config_file);
1038 parser = bus_config_load (&config_file, TRUE, NULL, error);
1041 _DBUS_ASSERT_ERROR_IS_SET (error);
1045 if (!process_config_every_time (context, parser, TRUE, error))
1047 _DBUS_ASSERT_ERROR_IS_SET (error);
1050 if (!process_config_postinit (context, parser, error))
1052 _DBUS_ASSERT_ERROR_IS_SET (error);
1056 if(context->myKdbusConnection)
1058 if(!update_kdbus_starters(context->myKdbusConnection))
1060 _dbus_verbose ("Update kdbus starters for dbus activatable names failed.\n");
1061 _DBUS_ASSERT_ERROR_IS_SET (error);
1067 bus_context_log (context, DBUS_SYSTEM_LOG_INFO, "Reloaded configuration");
1070 bus_context_log (context, DBUS_SYSTEM_LOG_INFO, "Unable to reload configuration: %s", error->message);
1072 bus_config_parser_unref (parser);
1077 shutdown_server (BusContext *context,
1080 if (server == NULL ||
1081 !dbus_server_get_is_connected (server))
1084 if (!dbus_server_set_watch_functions (server,
1088 _dbus_assert_not_reached ("setting watch functions to NULL failed");
1090 if (!dbus_server_set_timeout_functions (server,
1094 _dbus_assert_not_reached ("setting timeout functions to NULL failed");
1096 dbus_server_disconnect (server);
1100 bus_context_shutdown (BusContext *context)
1104 link = _dbus_list_get_first_link (&context->servers);
1105 while (link != NULL)
1107 shutdown_server (context, link->data);
1109 link = _dbus_list_get_next_link (&context->servers, link);
1114 bus_context_ref (BusContext *context)
1116 _dbus_assert (context->refcount > 0);
1117 context->refcount += 1;
1123 bus_context_unref (BusContext *context)
1125 _dbus_assert (context->refcount > 0);
1126 context->refcount -= 1;
1128 if (context->refcount == 0)
1132 _dbus_verbose ("Finalizing bus context %p\n", context);
1134 bus_context_shutdown (context);
1136 if (context->connections)
1138 bus_connections_unref (context->connections);
1139 context->connections = NULL;
1142 if (context->registry)
1144 bus_registry_unref (context->registry);
1145 context->registry = NULL;
1148 if (context->activation)
1150 bus_activation_unref (context->activation);
1151 context->activation = NULL;
1154 link = _dbus_list_get_first_link (&context->servers);
1155 while (link != NULL)
1157 dbus_server_unref (link->data);
1159 link = _dbus_list_get_next_link (&context->servers, link);
1161 _dbus_list_clear (&context->servers);
1163 if (context->policy)
1165 bus_policy_unref (context->policy);
1166 context->policy = NULL;
1171 _dbus_loop_unref (context->loop);
1172 context->loop = NULL;
1175 if (context->matchmaker)
1177 bus_matchmaker_unref (context->matchmaker);
1178 context->matchmaker = NULL;
1181 dbus_free (context->config_file);
1182 dbus_free (context->log_prefix);
1183 dbus_free (context->type);
1184 dbus_free (context->address);
1185 dbus_free (context->user);
1186 dbus_free (context->servicehelper);
1188 if (context->pidfile)
1191 _dbus_string_init_const (&u, context->pidfile);
1193 /* Deliberately ignore errors here, since there's not much
1194 * we can do about it, and we're exiting anyways.
1196 _dbus_delete_file (&u, NULL);
1198 dbus_free (context->pidfile);
1200 dbus_free (context);
1202 dbus_server_free_data_slot (&server_data_slot);
1206 /* type may be NULL */
1208 bus_context_get_type (BusContext *context)
1210 return context->type;
1214 bus_context_get_address (BusContext *context)
1216 return context->address;
1220 bus_context_get_servicehelper (BusContext *context)
1222 return context->servicehelper;
1226 bus_context_get_systemd_activation (BusContext *context)
1228 return context->systemd_activation;
1232 bus_context_get_registry (BusContext *context)
1234 return context->registry;
1238 bus_context_get_connections (BusContext *context)
1240 return context->connections;
1244 bus_context_get_activation (BusContext *context)
1246 return context->activation;
1250 bus_context_get_matchmaker (BusContext *context)
1252 return context->matchmaker;
1256 bus_context_get_loop (BusContext *context)
1258 return context->loop;
1261 DBusConnection* bus_context_get_myConnection(BusContext *context)
1263 return context->myKdbusConnection;
1267 bus_context_allow_unix_user (BusContext *context,
1270 return bus_policy_allow_unix_user (context->policy,
1274 /* For now this is never actually called because the default
1275 * DBusConnection behavior of 'same user that owns the bus can connect'
1276 * is all it would do.
1279 bus_context_allow_windows_user (BusContext *context,
1280 const char *windows_sid)
1282 return bus_policy_allow_windows_user (context->policy,
1287 bus_context_get_policy (BusContext *context)
1289 return context->policy;
1293 bus_context_create_client_policy (BusContext *context,
1294 DBusConnection *connection,
1297 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1298 return bus_policy_create_client_policy (context->policy, connection,
1303 bus_context_get_activation_timeout (BusContext *context)
1306 return context->limits.activation_timeout;
1310 bus_context_get_auth_timeout (BusContext *context)
1312 return context->limits.auth_timeout;
1316 bus_context_get_max_completed_connections (BusContext *context)
1318 return context->limits.max_completed_connections;
1322 bus_context_get_max_incomplete_connections (BusContext *context)
1324 return context->limits.max_incomplete_connections;
1328 bus_context_get_max_connections_per_user (BusContext *context)
1330 return context->limits.max_connections_per_user;
1334 bus_context_get_max_pending_activations (BusContext *context)
1336 return context->limits.max_pending_activations;
1340 bus_context_get_max_services_per_connection (BusContext *context)
1342 return context->limits.max_services_per_connection;
1346 bus_context_get_max_match_rules_per_connection (BusContext *context)
1348 return context->limits.max_match_rules_per_connection;
1352 bus_context_get_max_replies_per_connection (BusContext *context)
1354 return context->limits.max_replies_per_connection;
1358 bus_context_get_reply_timeout (BusContext *context)
1360 return context->limits.reply_timeout;
1363 dbus_bool_t bus_context_is_kdbus(BusContext* context)
1365 return context->myKdbusConnection != NULL;
1369 bus_context_log (BusContext *context, DBusSystemLogSeverity severity, const char *msg, ...) _DBUS_GNUC_PRINTF (3, 4);
1372 bus_context_log (BusContext *context, DBusSystemLogSeverity severity, const char *msg, ...)
1376 if (!context->syslog)
1378 /* we're not syslogging; just output to stderr */
1379 va_start (args, msg);
1380 vfprintf (stderr, msg, args);
1381 fprintf (stderr, "\n");
1386 va_start (args, msg);
1388 if (context->log_prefix)
1390 DBusString full_msg;
1392 if (!_dbus_string_init (&full_msg))
1394 if (!_dbus_string_append (&full_msg, context->log_prefix))
1396 if (!_dbus_string_append_printf_valist (&full_msg, msg, args))
1399 _dbus_system_log (severity, "%s", _dbus_string_get_const_data (&full_msg));
1401 _dbus_string_free (&full_msg);
1404 _dbus_system_logv (severity, msg, args);
1410 static inline const char *
1411 nonnull (const char *maybe_null,
1412 const char *if_null)
1414 return (maybe_null ? maybe_null : if_null);
1418 * Log something about a message, usually that it was rejected.
1421 complain_about_message (BusContext *context,
1422 const char *error_name,
1423 const char *complaint,
1425 DBusMessage *message,
1426 DBusConnection *sender,
1427 DBusConnection *proposed_recipient,
1428 dbus_bool_t requested_reply,
1432 DBusError stack_error = DBUS_ERROR_INIT;
1433 const char *sender_name;
1434 const char *sender_loginfo;
1435 const char *proposed_recipient_loginfo;
1437 if (error == NULL && !log)
1442 sender_name = bus_connection_get_name (sender);
1443 sender_loginfo = bus_connection_get_loginfo (sender);
1447 sender_name = "(unset)";
1448 sender_loginfo = "(bus)";
1451 if (proposed_recipient != NULL)
1452 proposed_recipient_loginfo = bus_connection_get_loginfo (proposed_recipient);
1454 proposed_recipient_loginfo = "bus";
1456 dbus_set_error (&stack_error, error_name,
1457 "%s, %d matched rules; type=\"%s\", sender=\"%s\" (%s) "
1458 "interface=\"%s\" member=\"%s\" error name=\"%s\" "
1459 "requested_reply=\"%d\" destination=\"%s\" (%s)",
1462 dbus_message_type_to_string (dbus_message_get_type (message)),
1465 nonnull (dbus_message_get_interface (message), "(unset)"),
1466 nonnull (dbus_message_get_member (message), "(unset)"),
1467 nonnull (dbus_message_get_error_name (message), "(unset)"),
1469 nonnull (dbus_message_get_destination (message), DBUS_SERVICE_DBUS),
1470 proposed_recipient_loginfo);
1472 /* If we hit OOM while setting the error, this will syslog "out of memory"
1473 * which is itself an indication that something is seriously wrong */
1475 bus_context_log (context, DBUS_SYSTEM_LOG_SECURITY, "%s",
1476 stack_error.message);
1478 dbus_move_error (&stack_error, error);
1482 * addressed_recipient is the recipient specified in the message.
1484 * proposed_recipient is the recipient we're considering sending
1485 * to right this second, and may be an eavesdropper.
1487 * sender is the sender of the message.
1489 * NULL for proposed_recipient or sender definitely means the bus driver.
1491 * NULL for addressed_recipient may mean the bus driver, or may mean
1492 * no destination was specified in the message (e.g. a signal).
1495 bus_context_check_security_policy (BusContext *context,
1496 BusTransaction *transaction,
1497 DBusConnection *sender,
1498 DBusConnection *addressed_recipient,
1499 DBusConnection *proposed_recipient,
1500 DBusMessage *message,
1504 BusClientPolicy *sender_policy;
1505 BusClientPolicy *recipient_policy;
1506 dbus_int32_t toggles;
1509 dbus_bool_t requested_reply;
1511 type = dbus_message_get_type (message);
1512 dest = dbus_message_get_destination (message);
1514 /* dispatch.c was supposed to ensure these invariants */
1515 _dbus_assert (dest != NULL ||
1516 type == DBUS_MESSAGE_TYPE_SIGNAL ||
1517 (sender == NULL && !bus_connection_is_active (proposed_recipient)));
1518 _dbus_assert (type == DBUS_MESSAGE_TYPE_SIGNAL ||
1519 addressed_recipient != NULL ||
1520 strcmp (dest, DBUS_SERVICE_DBUS) == 0);
1524 case DBUS_MESSAGE_TYPE_METHOD_CALL:
1525 case DBUS_MESSAGE_TYPE_SIGNAL:
1526 case DBUS_MESSAGE_TYPE_METHOD_RETURN:
1527 case DBUS_MESSAGE_TYPE_ERROR:
1531 _dbus_verbose ("security check disallowing message of unknown type %d\n",
1534 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1535 "Message bus will not accept messages of unknown type\n");
1540 requested_reply = FALSE;
1544 /* First verify the SELinux access controls. If allowed then
1545 * go on with the standard checks.
1547 if (!bus_selinux_allows_send (sender, proposed_recipient,
1548 dbus_message_type_to_string (dbus_message_get_type (message)),
1549 dbus_message_get_interface (message),
1550 dbus_message_get_member (message),
1551 dbus_message_get_error_name (message),
1552 dest ? dest : DBUS_SERVICE_DBUS, error))
1554 if (error != NULL && !dbus_error_is_set (error))
1556 /* don't syslog this, just set the error: avc_has_perm should
1557 * have already written to either the audit log or syslog */
1558 complain_about_message (context, DBUS_ERROR_ACCESS_DENIED,
1559 "An SELinux policy prevents this sender from sending this "
1560 "message to this recipient",
1561 0, message, sender, proposed_recipient, FALSE, FALSE, error);
1562 _dbus_verbose ("SELinux security check denying send to service\n");
1568 if (bus_connection_is_active (sender))
1570 sender_policy = bus_connection_get_policy (sender);
1571 _dbus_assert (sender_policy != NULL);
1573 /* Fill in requested_reply variable with TRUE if this is a
1574 * reply and the reply was pending.
1576 if (dbus_message_get_reply_serial (message) != 0)
1578 if (proposed_recipient != NULL /* not to the bus driver */ &&
1579 addressed_recipient == proposed_recipient /* not eavesdropping */)
1583 dbus_error_init (&error2);
1584 requested_reply = bus_connections_check_reply (bus_connection_get_connections (sender),
1586 sender, addressed_recipient, message,
1588 if (dbus_error_is_set (&error2))
1590 dbus_move_error (&error2, error);
1598 /* Policy for inactive connections is that they can only send
1599 * the hello message to the bus driver
1601 if (proposed_recipient == NULL &&
1602 dbus_message_is_method_call (message,
1603 DBUS_INTERFACE_DBUS,
1606 _dbus_verbose ("security check allowing %s message\n",
1612 _dbus_verbose ("security check disallowing non-%s message\n",
1615 dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
1616 "Client tried to send a message other than %s without being registered",
1625 sender_policy = NULL;
1627 /* If the sender is the bus driver, we assume any reply was a
1628 * requested reply as bus driver won't send bogus ones
1630 if (addressed_recipient == proposed_recipient /* not eavesdropping */ &&
1631 dbus_message_get_reply_serial (message) != 0)
1632 requested_reply = TRUE;
1635 _dbus_assert ((sender != NULL && sender_policy != NULL) ||
1636 (sender == NULL && sender_policy == NULL));
1638 if (proposed_recipient != NULL)
1640 /* only the bus driver can send to an inactive recipient (as it
1641 * owns no services, so other apps can't address it). Inactive
1642 * recipients can receive any message.
1644 if (bus_connection_is_active (proposed_recipient))
1646 recipient_policy = bus_connection_get_policy (proposed_recipient);
1647 _dbus_assert (recipient_policy != NULL);
1649 else if (sender == NULL)
1651 _dbus_verbose ("security check using NULL recipient policy for message from bus\n");
1652 recipient_policy = NULL;
1656 _dbus_assert_not_reached ("a message was somehow sent to an inactive recipient from a source other than the message bus\n");
1657 recipient_policy = NULL;
1661 recipient_policy = NULL;
1663 _dbus_assert ((proposed_recipient != NULL && recipient_policy != NULL) ||
1664 (proposed_recipient != NULL && sender == NULL && recipient_policy == NULL) ||
1665 (proposed_recipient == NULL && recipient_policy == NULL));
1668 if (sender_policy &&
1669 !bus_client_policy_check_can_send (sender_policy,
1673 message, &toggles, &log))
1675 complain_about_message (context, DBUS_ERROR_ACCESS_DENIED,
1676 "Rejected send message", toggles,
1677 message, sender, proposed_recipient, requested_reply,
1678 (addressed_recipient == proposed_recipient), error);
1679 _dbus_verbose ("security policy disallowing message due to sender policy\n");
1685 /* We want to drop this message, and are only not doing so for backwards
1687 complain_about_message (context, DBUS_ERROR_ACCESS_DENIED,
1688 "Would reject message", toggles,
1689 message, sender, proposed_recipient, requested_reply,
1693 if (recipient_policy &&
1694 !bus_client_policy_check_can_receive (recipient_policy,
1698 addressed_recipient, proposed_recipient,
1701 complain_about_message (context, DBUS_ERROR_ACCESS_DENIED,
1702 "Rejected receive message", toggles,
1703 message, sender, proposed_recipient, requested_reply,
1704 (addressed_recipient == proposed_recipient), NULL);
1705 _dbus_verbose ("security policy disallowing message due to recipient policy\n");
1709 /* See if limits on size have been exceeded */
1710 if (proposed_recipient &&
1711 ((dbus_connection_get_outgoing_size (proposed_recipient) > context->limits.max_outgoing_bytes) ||
1712 (dbus_connection_get_outgoing_unix_fds (proposed_recipient) > context->limits.max_outgoing_unix_fds)))
1714 complain_about_message (context, DBUS_ERROR_LIMITS_EXCEEDED,
1715 "Rejected: destination has a full message queue",
1716 0, message, sender, proposed_recipient, requested_reply, TRUE,
1718 _dbus_verbose ("security policy disallowing message due to full message queue\n");
1722 /* Record that we will allow a reply here in the future (don't
1723 * bother if the recipient is the bus or this is an eavesdropping
1724 * connection). Only the addressed recipient may reply.
1726 if (type == DBUS_MESSAGE_TYPE_METHOD_CALL &&
1728 addressed_recipient &&
1729 addressed_recipient == proposed_recipient && /* not eavesdropping */
1730 !bus_connections_expect_reply (bus_connection_get_connections (sender),
1732 sender, addressed_recipient,
1735 _dbus_verbose ("Failed to record reply expectation or problem with the message expecting a reply\n");
1739 _dbus_verbose ("security policy allowing message\n");